body,html{
    margin: 0;
    padding: 0;
}
.all{
    display: block;
    overflow: hidden;
    background-color: #fafafa;
}
.top{
    display: block;
    width: 80%;
    height: 75px;
    margin: 0 auto;
    padding: 15px;
}
.top img{
    display: block;
    width: 200px;
    height: 40px;
    margin-top: 15px;
}
.top .topright{
    display: block;
    width: 650px;
    height: 40px;
    float: right;
    margin-top: -40px;
}
.top .topright li{
    display: block;
    float: left;
    margin-left: 60px;
    list-style: none;
    height: 40px;
    font-size: 20px;
    line-height: 40px;
    
}
.top .topright li a{
    width: 40px;
    height: 40px;
    text-decoration: none;
    font-size: 20px;
}
#content{
    width: 100%;
    height: 686px;
    margin: 0 auto;
    background-image: url(../img/video.jpg);
    overflow: hidden;
}